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OpenEO Platform - User Story 3

On-demand processing of Sentinel-1 data

Connect to openEO Platform and authenticate using EGI

Area of Interest selection

Run the next cell, click on the rectangle button and then draw the area over the map like in the following example image

rectangle_selection

Get the bounding box from the previous map.

Sentinel-1

CARD4L ARD Sentinel-1 processed with SentinelHub

[1] Define range of interest in time for Sentinel-1

[2] Apply the CARDL compliant SAR processing and conversion to dB:

[3] Save process as final step, here we use NetCDF as output format.

[4] Now we will create a batch job and start it. More info about batch jobs can be found here:

https://openeo.org/documentation/1.0/glossary.html#data-processing-modes

https://open-eo.github.io/openeo-python-client/batch_jobs.html

If our area of interest is small, we can also do a direct request, but this will not return the CARD4L json metadata.

Note that this step automatically adds the save_result process at the end based on the output format we choose.

We can get a description of the job and check its status.

Download complete result with metadata and source files

CARD4L results contain STAC metadata and the requested image.

We can simply download everything, for inspection. Please note: this will download also the original S1 GRD files, which can take a lot of time for a big area or a timeseries.

The downloaded data can be opened, but these are fairly large files, making visualization more difficult.

The foreseen way of interacting with it is to use openEO to further process the dataset into a more manageable result.

Output visualization

If we don't need CARDL compliant data, we can also use the sar_backscatter process:

Sigma0:

Gamma0:

Sigma To Gamma Ratio

Timeseries comparison

Compute the mean value, for each timestamp. OpenEO can also do this for you.

Sentinel-1

CARD4L ARD Sentinel-1 processed with SNAP

Connect to openEO Platform and authenticate using EGI

Explore the pre-computed data and find the available dates over our area of interest:

[1] Define range of interest in time for Sentinel-1

[2] Apply the CARDL compliant SAR processing.

[3] Save process as final step, here we use GeoTIFF as output format.

[4] Now we will create a batch job and start it.

Output visualization